Function steamworks_sys::SteamAPI_ISteamInventory_SetPropertyInt64

pub unsafe extern "C" fn SteamAPI_ISteamInventory_SetPropertyInt64(
    self_: *mut ISteamInventory, 
    handle: SteamInventoryUpdateHandle_t, 
    nItemID: SteamItemInstanceID_t, 
    pchPropertyName: *const c_char, 
    nValue: int64
) -> bool